Walker safety device

Abstract

A safety device for a walker includes a distance measuring sensor for determining whether a user is at too far or too close distances relative to the front side of the walker. The sensor provides data to a CPU processor indicative of such events. The processor includes logic which analyzes such data and provides audial, visual and/or tactile stimuli to the user warning the user that he/she is at undesirable distances relative to the walker. The process logic can be modified so as to vary the type and/or frequency of warnings given to the user.

Claims

1. A safety device for a walker comprising: a housing configured for attachment to a walker along a front side thereof, said housing presenting at least a first electronic warning display; an electronic sensor within said housing for providing data corresponding to a distance of a user from the front side of the walker, said data including a first set of data indicative of a user of the walker being at a first distance from the front side of the walker, said data also including a second set of data indicative of a user being at a second distance from the front side of the walker; an electronic module coupled with the sensor for processing said data provided by said sensor, said electronic module energizing at least said first electronic warning display upon said processing of said first data set if said first distance is greater than a first preset distance, and said electronic module energizing at least said first electronic warning display upon said processing of said second data set if said second distance is less than a second preset distance, wherein said second preset distance is less than said first preset distance.

2. The device as claimed in claim 1 wherein said at least first electronic warning display comprises first and second audial tones, said first audial tone energized upon said processing of said first data set if said first distance is greater than said first preset distance and said second audial tone energized upon said processing of said second data set if said second distance is less than a second preset distance.

3. The device as claimed in claim 2 wherein said second audial tone comprises a volume greater than said first audial tone.

4. The device as claimed in claim 1 wherein said at least first electronic warning display comprises a second warning display presenting a stimulus not presented by said first electronic warning display.

5. The device as claimed in claim 4 wherein said stimulus provided by said second warning display comprises a visual stimulus, said visual stimulus energized by said module upon said processing of said first or second data sets or both.

6. The device as claimed in claim 4 further comprising a tactile warning display presenting a stimulus differing from said stimulus provided by said at least first and second warning displays, said tactile warning display energized upon said processing of said first or second data sets or both.

7. The device as claimed in claim 1 further comprising: a counter in said electronic module having a starting zero position, said counter count at said zero position precluding said electronic module from energizing said at least said first electronic warning display; a threshold count having a preselected value, said counter count incremented upon each processing of said first data set if said first distance is greater than said first preset distance, said electronic module energizing said at least first warning display upon said counter count reaching said threshold count.

8. The device as claimed in claim 1 further comprising: a counter in said electronic module having a starting zero position, said counter at said zero position precluding said electronic module from energizing at least said first electronic warning display; a threshold count having a preselected value, said counter count incremented upon each processing of said first or second data sets or both if said first distance is greater than said first preset distance or if said second distance is less than said second preset distance, said electronic module energizing at least said first electronic warning display upon said counter count reaching said threshold count.

9. The device as claimed in claim 8 wherein said counter is set at said zero position upon said processing of data being neither a first data set nor a second data set or both.

10. A safety device for a walker comprising: a housing configured for attachment to a walker along a front side thereof, said housing presenting first and second warning displays; an electronic sensor within said housing for providing data corresponding to a distance of a user of the walker from the housing, said provided data including data corresponding to a first distance of the user from said housing, said provided data also including data corresponding to a second distance of the user from said housing; and a processor coupled with the sensor for analyzing said provided data, said processor energizing said first warning display upon analyzing said data corresponding to said first distance if said first distance is greater than a first preset distance, said processor energizing said second warning display upon analyzing said data corresponding to said second distance if said second distance is less than a second preset distance, wherein said second preset distance is less than said first preset distance.

11. The device as claimed in claim 10 wherein said first warning display comprises a first audial tone.

12. The device as claimed in claim 11 wherein said second warning display comprises a second audial tone different in volume from said first audial tone, whereby said first and second audial tones are indicative of the user's proximity to said housing.

13. The device as claimed in claim 10 further comprising a second warning display presenting a warning different than said first warning display.

14. The device as claimed in claim 13 wherein said second warning display comprises a tactile stimulus.

15. The device as claimed in claim 14 wherein said housing includes a vibrator, said vibrator providing said tactile stimulus to the user grasping said walker.

16. The device as claimed in claim 11 further comprising a display other than said first and second warning displays energized by said processor upon analyzing data provided by said sensor if said first distance is not greater than said first preset distance and said second distance is not less than said second preset distance.

17. The device as claimed in claim 10 comprising: a counter coupled to said processor having a starting zero position, said counter at said zero position precluding said processor from energizing said first warning display; a threshold count having a preselected value, said counter incremented upon each analyzing of said data corresponding to said first distance if said first distance is greater than said first preset distance, said processor energizing said first warning display upon said counter count reaching said threshold count.

18. A safety walker device comprising: a housing configured for attachment to a walker along a front side thereof; means for providing a visual stimuli to a user of the walker: means for providing an audial stimuli to a user of the walker: means for providing tactile stimuli to a user of the walker; a sensor within said housing for providing data indicative of a distance of a user of the walker from the housing; and a processor coupled with the sensor for interpreting the data received from the sensor, said processor comparing said data received from the sensor to a first preset data point corresponding to a first distance of the user from said housing and a second preset data point corresponding to a second distance of the user from said housing, wherein said first distance is greater than said second distance, said processor including logic for energizing the visual or tactile or audial stimuli means or combination thereof upon comparing said data received from the sensor to the first and second preset data points if said data indicates a user of the walker is a distance from the housing that is greater than said first distance or less than said second distance.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a block diagram showing the system overview;

(2) FIG. 2 is a flow diagram showing the processing provided by the CPU software;

(3) FIG. 3 is a list of materials utilized in the safety device;

(4) FIG. 4 is a more detailed list of materials utilized in the safety device;

(5) FIG. 5 illustrates an electrical diagram detail;

(6) FIG. 6 further illustrates electrical diagram details of the alert red light, vibrator and distance set functions;

(7) FIG. 7 illustrates the electrical detail of the sensor and amplifier circuits of the safety device;

(8) FIG. 8 illustrates one form of the housing of the device on the front cross bar of a walker;

DESCRIPTION OF THE PREFERRED EMBODIMENT

(9) Turning more particularly to the drawings, FIG. 1 generally illustrates the basic system configuration as including a sensor 100 with processor 200 (FIG. 5) including the logic software 250 as shown in FIG. 2. Various peripheral controls 300 enable the user to regulate the device, including the on/off switch 302, the vibrator option 304 (FIG. 6), the “potentiometer” settings of the too close 306 and too far 308 distances (FIG. 6), and the volume control 310 of the alarms 400 (FIG. 7) as controlled by switch 314. Feedback 400 to the user is provided by a red/green glowing LED 420 through lens 504, sound alarms 422 and the tactile vibratory alarm 424, which can be selectably activated by the user by the above switches. FIGS. 3 and 4 list the various elements utilized in the system, it being understood that such elements are available on the marketplace including equivalents thereof.

(10) Housing 500, which contains the FIG. 3 items, is placed on the front bar 1100 of the walker as shown in FIG. 8. Located within housing 500 and directed through port 502 is a distance measuring sensor 100 which provides an analog output. One type of sensor may be the Sharp GP2Y0A020F distance measuring unit. This sensor combines a position sensitive detector, an infrared emitting diode and a signal processing circuit. The sensor produces a voltage output corresponding to the detected distance. Thus it can be used as a proximity sensor. Its features include:

(11) 1. Distance measuring range: 20 to 150 cm

(12) 2. Analog output

(13) 3. Size: 29.5×13×21.66 mm

(14) 4. Consumption current: Typ. 33 mA

(15) 5. Supply voltage: 4.5 to 5.5 V

(16) Other characteristics as shown below:

(17) TABLE-US-00001 Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage V.sub.DC −0.3 to +7 V Output terminal voltage V −0.3 to V.sub.CC + 0.3 V Operating temperature T.sub.opt −10 to +60 ° C. Storage temperature T.sub.stg −40 to +70 ° C.

(18) TABLE-US-00002 Electro-Optical Characteristics Parameter Symbol Conditions MIN. TYP. MAX. Unit Average supply I.sub.cc — 33 50 mA current Measuring ΔL 20 — 150 cm distance range Output voltage V.sub.a L-150 0.25 0.4 0.55 V cm Output voltage ΔV.sub.a 1.8 2.05 2.3 V differential* *Output voltage difference between L-20 cm and L-150 cm (Note 1)

(19) TABLE-US-00003 Recommended Operating Conditions Parameter Symbol Conditions Rating Unit Supply voltage V.sub.cc 4.5 to 5.5 V

(20) As shown above, the housing contains the proximity sensor 100, which has a measuring distance capable of 20 to 150 cms. This distance range will include the desired displacements of the user from the front cross bar 1100 of the walker, i.e., a too “close” or a too “far” distance. As shown in the electrical diagram these too “close” or too “far” distances can be preset by dials 306, 308 which control potentiometers (FIG. 6). These resulting voltage outputs, corresponding to the too close or too far distances of the user from the sensor, can then be processed by the FIG. 2 logic. (See FIG. 5: Close Pot/Pin 1, Far Pot/Pin 0).

(21) As shown in FIG. 2, the CPU signal processing receives the incoming voltage and first determines whether the data provided by the sensor 100, is within the user-defined too far or too close set points (210) set by controls 308, 306. If so, the glowing red LED 420, if lit, is extinguished (FIG. 6), the alarm counter 520 is set to zero and the LED 420 will glow green through lens 504. If beyond a desired distance (214), the LED 420 glows red and a high audio alarm 422 is energized as controlled by a signal sent by the program logic (FIG. 7).

(22) Optionally, the software also detects whether the signal indicates the user is too close (216) to the walker. As such, the program logic will send a signal to the amplifier circuit (FIG. 7) such that a lower audio alarm is energized via the speaker 508 as this displacement is not as critical as a too “far” displacement. It is understood that the processing logic may be modified so as to address only sensor signals which indicate that the user is too far away from the sensor 100, i.e., outside the confines of the walker. In either case the green glow of LED 420 is extinguished.

(23) A counter 520 may also be utilized in the processing logic to count the extent of the user's undesirable displacements relative to the walker whether too far, too close or both. Once the alarm counter 520 reaches a preselected threshold of undesirable displacements, LED 420 is energized so as to glow both colors. Accordingly, the frequency of warnings of undesirable displacements provided to the user may be regulated during ambulatory movement rather than warnings being given each time the user moves to an undesirable displacement.

(24) As such the CPU processing software provides the user with various visual, audio and tactile alarms indicative of the user drifting too close or away or both from the walker. Thus, the user can take corrective action. Once the number of such undesirable displacements is reached without correction, the user is provided with a plurality of alarms. These multiple alarms advise the user as well as other personnel of a user's problem with the walker.

(25) Also, haptic/tactile feedback may also be provided to the user if too “close” or “far” displacements are detected (see FIG. 6: Vibration Option). A vibration motor 304, e.g., as the Spark Fun/Precision 310-101 shaftless vibration motor can be used. Once energized the vibration will move along the walker structure so as to be sensed by the user. Such feedback can be valuable to users having audial and/or visual difficulties.

(26) It is also understood that the above disclosure enables one to modify the processing logic so as to provide various levels of feedback to the user, e.g., visual only, audio only, tactile only or various combinations thereof with or without the counter function.

(27) It is understood that the above logic software is effective in training the new user. Thus, the safety device can be used in both training and continuing use environments.

(28) It is to be understood that while certain forms of this invention have been illustrated and described, it is not limited thereto, except in so far as such limitations are included in the following claims and allowable equivalents thereof.